Peripheral Angioplasty is a procedure that opens up narrowed or blocked peripheral arteries (arteries not supplying the brain or heart). The femoral artery of the leg is a common site of peripheral angioplasty. A catheter with an empty balloon on its tip is guided into the narrowed part of the artery. The balloon is then filled with air to flatten the plaque against the artery wall. The balloon is deflated and the catheter and wire are removed.